太阳能互补联合循环热电联供动态控制策略研究

Study on Dynamic Performance and Control Strategy of Solar Energy Adied Combined Cycle Complementary System Under Cogeneration Operation

热电联供技术不仅能够有效保障工业供汽和居民供暖,还可提高机组的能源利用效率。本文建立了太阳能热集成燃气蒸汽联合循环系统的热电联供动态模型,并据此提出相应的运行控制策略,在此基础上对系统典型天运行工况下的动态运行特性展开了分析。结果表明:该运行策略下,系统各运行参数可保持平稳,例如主蒸汽参数、供热功率、发电功率等不随太阳辐照的波动而波动,系统热效率在55%~63%之间,且与系统中太阳能输入的热量成反比。此外在该典型天中,系统中太阳能的发电量和供热量分别为114.96 MWh和5.3×10^(5)GJ。

Cogeneration technology can not only supply industrial steam and civil heating,but also improve the energy utilization efficiency of power plant.In this paper,the dynamic model of solar adied combined gas and steam cycle system is established,and the corresponding operation control strategy is proposed.On this basis,the dynamic characteristics of the system under typical operating condition are analyzed.The results show that the system operating parameters,such as main steam parameters,heating power and generating power are remain relatively stable when the solar irradiation fluctuates.The thermal efficiency of the system is between 55%and 63%,and is inversely proportional to the heat input of solar energy in the system.In addition,the solar power generation and heating capacity in the system are 114.96 MWh and 5.3×10^(5) GJ,respectively.